Squaring tool



P 2, 1952 J, F. DOUD 2,608,765 SQUARING TOOL I Filed Nov. 17, 1949 SNVENTOR ATTORNEY Patented Sept. 2-, i952 STATES t 2,608,765, SQUARING r 1 i y Joseph F. nous, Beings; in 1. 7 ApplicationNovember 17, lildil r erialflio 1273Mi "3 Claims. (c1.:3s"-1 1 2) This invention relates to' certain newanduseful improvements in squaringtools of the'type used by toolmakers, machinists and the like.

It has for its primary object to provide a tool of this character which is so designed and constructed as to enable the toolmaker himself to correct and reset the tool should it become out of true and eliminate the time and expense of returning it to the factory for that purpose.

Another object of the invention is to provide a squaring tool having simple, novel and inexpenthe appended claims.

In the accompanying drawings:

Figure 1 is a perspective of the squarin tool embodying my invention. Figure 2 is an enlarged fragmentary side elevation thereof. Figure 3 is a transverse vertical section taken on line 3-3, Figure 2. Figure 4 is a horizontal section taken on line 4-4, Figure 2. Figure 5 is a fragmentary perspective view of the tool-blade.

Similar characters of reference indicate corresponding parts throughout the several views.

My invention has been shown in connection with the usual type of toolmakers square conslsting of a head l6 and blade H disposed at right angles thereto. As presently marketed, when these tools require correction because of becoming out of true or misalined, say from five to ten thousandths out of normal, it is necessary to send them back to the factory for adjustment. The purpose of my invention is to provide for the adjustment of the tool by the toolmaker himself and thereby save the time and expense of sending it to the factory. r

The head In is provided at its upper end with a recess or mortise defining a blade-backing portion I2 and an upwardly-facing, truly-squared shoulder [3 against which the inner or lower chamfered edge of the blade ll rests or abuts to form a true right angle. The blade is secured transversely to the head preferably by socketheaded bolts l4 disposed in diagonal fashion in the manner shown in Figures 1 and 2. An adjusting screw I5 is provided for correctively adjusting and clamping the blade in proper relation to its head should it accidently become misvertically or longitudinall of the headin" a plane between the fastening bolts M with its threaded shank engaging a tapped opening I6 in the upper portion of the tool-head adjacent its blade-bearing face and with the socketed-head I 7 of the screw engagin an alining counter bore [8 whose peripheral side portion facing the blade I0 is open, as shown in Figurei, for the lateral projection therethrough of the companion side of the screw-head.

Formed in the inner head-engaging face of the blade is a recess IS in opposing registering relation with the open side of the counter bore l8 and of suchdimensions as to be engaged by the adjoinin side or peripheral portion of the adjusting screw head H, as shown in Figures 3 and 4, so that when such screw is turned down it will abut the bottom edge of the blade-recess and uniformly force the blade edgewise and snugly and firmly against the squared shoulder l3 of the tool-head.

When correction of the tool becomes necessary, the fastened bolts M are loosened and the adjusting screw I5 is first relieved and then screwed home with its head-forming shoulder abutting against the bottom edge of the blade-recess [9 to properly and correctively aline the bottom edge of the blade H and draw it snugly against the head-shoulder l3, after which the fastening bolts are screwed home to securely retain the blade in its proper, true angular relation to the head III. In practice, after loosening the bolts l4 and the adjusting screw, the tool is checked by lining it up with a so-called master cylinder or gage block and using a tenth indicator for checking the blade at each end, after which the adjusting screw-is properly set and the fastening screws tightened.

I claim as my invention:

1. A squaring tool, comprising a blade, a head mortised at its upper end to define a blade-backing portion and an upwardly-facing squared shoulder against which the lower edge of the blade is adapted to abut, a pair of substantially diagonally-disposed screw means for transversely fastening the blade to the head, said blade having a recess between its upper and lower'edges and in that side thereof facing the backing portion of the head, and an adjusting screw disposed centrally in the upper end of said tool-head at right angles to and between said transverse screw means and having itshead extending at one side thereof into register with said blade-recess, one or the other of said diagonally disposed screw aligned? This screw is'disppsedflcent lly and means serving as a fulcrum during the adjustment of the blade.

2. A squaring tool, comprising a blade, a head mortised at its upper end to define a blade-backing portion and an upwardly-facing squared shoulder against which the lower edge of the blade is adapted to abut, a pair of substantially diagonally-disposed screw means for transversely fastening the blade fiatwise against the backing portion ofthe' head,' said blade having a recess in that side thereof facing and shrouded by said head-backing portion and the head having a tapped opening disposed centrally and vertically in the upper end thereof in a plane between said screw means and terminating in its blade-backing portion in an alining counter zbore in'exposed registering relation to said blade-recess, and an adjusting screw disposed in said tapped opening and having its head in engagement with said blade-recess.

, 3. A squaring tool, comprising a blade having a recess in theinner face of its attachingend,

a head mortised at its upper end to define a blade-' REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 0 Number Name Date 761,929 Weld June '7, 1904 1,489,577 7 Hanson Apr. 8, 1924 

